Question

The first term of an A.P. is -5 and the common difference is 2, then the sum of the first 6 terms is​

Answer 1

Answer:

Nth term of an ap is 116 whose first term is 2 and common difference is 6 find the sum of all terms - 11519702. ... If (4, 19) is a solution of the equation yax + 3, then a = · Divide a line segment 7 cm ...

Answer 2

Let x be the unit digit of the number.

Then, the ten's digit = 11−x

Therefore, Number = 10(11−x)+x=110−10x+x=110−9x

When digits are interchanged ,

unit digit=11−x and tens digit =x

So, number obtained by interchanging the digits= 10x+(11−x)=9x+11

As per the question-

9x+11−(110−9x)=9

⇒9x+11−110+9x=9

⇒18x+11−110=9

⇒18x=9−11+110

⇒18x=108

⇒x=6

Hence, unit's digit = 6 and ten's digit = 11−6=5.

Therefore, the required number is 56.