Question

If a1+a24=100 then what is a2 +a23=?

Answer 1

Answer:

100

Step-by-step explanation:

in a. p we know that

a24 = a + 23d,

a23 = a + 22d &

a2 = a + d

given

a1 + a24 = 100

= a +( a + 23d) = 100

= 2a + 23d = 100. ......(eq1)

now,

we have to find

a2 + a23

= (a + d) + ( a + 22d)

= 2a +23d

which is equal to 100 from equation 1

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Answer 2

Answer:

100

Step-by-step explanation:

a1+a24=100

a+(a+23d)=100. [ here a=first term]

a+a+23d=100

2a+23d=100. (1)

a2+a23= (a+d)+(a+22d)

=2a+23d. from (1)

=100

OR

let us consider there are n terms in the ap...

and we r taking its first 24 terms....

therefore, we know that

sum of first and last term of an ap = sum of second and second last term... and so on... to double of middle term.

therefore... the answer will be 100.