The number of irrational terms in the expansion of
97
98
96
99
As 2 and 5 are co-prime will be rational if is multiple of 8 and r is multiple of 6 also
But 100-r is to be multiple of 8
So,
Common terms in (i) and (ii) are 16, 40, 64, 88.
give rational terms The number of irrational terms = 101 – 4 = 97.
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