Question
If a, 1, b are in arithmetic progression and 1, a, b are
in geometric progression, then a and b are respectively equate to _______ (where a ≠ b).Solution
Given a, 1, and b are in AP and 1, a, and b are in GP: From AP= 1- a=b-1 b=2- a … (1) From GP- b = a² … (2) from Eq (1) and Eq (2) a² = 2-a a²+a-2=0 a2+2a- a -2 =0 a = 1 or - 2 Since a ≠ 1: a = -2 b = a² = 4 So, a = -2 and b = 4. Alternate method- According to the option- (a + b)/2 = 1 (a + b) = 2 Put the value of a and b in the option and satisfied. Taking option 2. (-2 + 4) = 2 2 = 2 (satisfied)
Which of the following is a hexaploid species of wheat?
Which one of the following statements is incorrect with respect to microbial enzymes?
Food Safety and Standards Authority of India has set up a scientific panel on
Powdery Mildew of fungi belongs to order
The irrigation water contains CO2ZHCO3, Ca++ and Mg++ ion 1, 4, 2.5 & 1.5. Calculatethe RSC (residual sodium carbonate) in irrigation water ...
Botulism is an example or type of
Diffused radiation contains____ percent of photosynthetically active radiation.
Under Section (43)2 of the FSS Act 2006 the FSSAI has notified how many laboratories in September 2017:
Agrobacterium is widely used for gene transfer because
Dehradun-based Indian Institute of Petroleum has pilot tested to convert used cooking oil into:
Relevant for Exams:
