Question
If (a + b) = 1 and (1/a) – 2b = 5/a then find the
value of a2 + b2.Solution
As, a2 + b2 = (a + b)2 – 2ab ------------- (1) (1/a) – 2b = 5/a 1/a – 5/a = 2b - 4/a = 2b 2ab = - 4 Substitute the values of 2ab and a + b in (1) a2 + b2 = 1 - (-4) = 5
The questions below are based on the given Series-I. The series-I satisfies a certain pattern, follow the same pattern in Series-II and answer the ques...
4 5.5 19 .5 98.5 694 6251.5
...42 43 46 ...
203, 223, 198, 218, ?, 213
400 596 452 552 488 524
100 a �...
111 113 117 120 ? 133
85 135 172 ? 215 225
There are 3 series, you have to find value of a, b, c and then establish relation among a,b,c.
19, 25, 45, a, 553, 2767
1560 760 360 160 6...
5 13 36 145 719 4321
84, 61, 80, 57, 76, ?
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