Question

Find a30-a20 for the AP -9, -14, -19, -24. .

Answer 1

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Please see this attachment.
Hope this helps you....

Answer 2

Hey user here is your answer....

---> Given A.P= -9,-14,-19,-24...

a=-9

d=-14-(-9)
=-14+9
=-5

◆a30=a+(30-1)d
◆a30=-9+29(-5)

◆a30=-9-145
◆a30=-154

◆a20=a+19d

◆a20=-9+19(-5)
◆a20=-9-95
◆a20=-104

--->a30-a20=-154-(-104)

◆-154+104
=-50

-_______Hope it helps you______

#Rohan ( Maths aryabhatta )