Total no. of of terms in the expansion of (x+a)^100 + (x-a)^100 after simplication is?

and how is the answer - 50 if simplication is

2(X¹⁰⁰+¹⁰⁰c₂ x⁹⁸ a² + ¹⁰⁰c₄ x⁹⁶ a⁴+….+¹⁰⁰c₁₀₀ a ¹⁰⁰)

hey the ans of your question is 51 not 50

after simplification its going to be

2(X100+100c2  x98 a2 + 100c4 x96 a4+….+100c100 a 100) from  a2 - a100 there are 50 terms but you forgot the first term so the ans is 51. Hope i helped..!

2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40,42,44,46,48,50,52,54,56,58,60,62,64,66,68,70,72,74,76,78,80,82,84,86,88,90,92,94,96,98,100. There are 50terms from a^2 to a^100 but what about a^0 is it included or no

2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40,42,44,46,48,50,52,54,56,58,60,62,64,66,68,70,72,74,76,78,80,82,84,86,88,90,92,94,96,98,100. There are 50terms from a^2 to a^100 but what about a^0 is also included so final answer is 51 terms