Question
For what value of a does the quadratic equation x² + ax +
81 = 0 have real and identical roots?Solution
ATQ,
Discriminant should be zero:
a² - 4×1×81 = 0
⇒ a² = 324
⇒ a = ±18
Which one is insect trap crop?
Scientific name of potato is:
Which disease induces floral abnormalities like phyllody?
Relationship between plant population and yield is asymptotic for which of the following crops?
Which one the following is subjected to photo-decomposition?
Match List-I with List-II and select the correct answer using the codes given below the lists.
ELISA sensitivity typically ranges between:
Match List I with respective critical stage of irrigation of crops List II
Which of the following peach varieties is considered self-unfruitful and requires cross-pollination?
Which of the following is considered as an essential step in the exchange of gases during respiration and photosynthesis?
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