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Efectuati,utilizand factorul comun:

a) 2^76+2^78+2^80
b) 3*5^47+2*5^48+6*5^49
c) 9^1001+9^1000+7*9^999
d) 7*4^35+2*4^36-4^34
e) 13^14*3-13^13*2-13^12
f) 8^200-3*8^198+2*8^197
g) 46^135+5*46^136-46^134
h) 3^n+2+7*3^n+3-5*3^n+1
i) 2^102-2^101-2^100-2^99

Va rog,e pt maine,dau coroana


Răspuns :

a) 2^76+2^78+2^80
b) 3*5^47+2*5^48+6*5^49=5^47*(3+2*5+6*5^2)=
5^47*(3+10+150)=
=5^47*163
c) 9^1001+9^1000+7*9^999=
9^999(9^2+9^1+7*9^0)=9^999(81+9+7)=
=
9^999 * 97
d)
7*4^35+2*4^36-4^34= 4^34(7*4+2*4^2-1)=4^34(28+32-1)=4^34 *49
e) 13^14*3-13^13*2-13^12=
13^12(13^2*3-13^1*2-1)=13^12(507-26-1)=
=13^12 * 480
f)
8^200-3*8^198+2*8^197= 8^197(8^3-3*8^1+2*1)= =8^197(512-24+2)=
=8^197 * 490
g)
46^135+5*46^136-46^134=46^134(46^1+5*46^2-1)=46^134(46+10580-1)=
=
46^134 *10625
 h)
3^n+2+7*3^n+3-5*3^n+1=3^n *(3^2+7*3^3+3-5*3^1)=3^n *(9+189-15)=
=3^n * 183
i)
2^102-2^101-2^100-2^99= 2^99 *(2^3-2^2-2^1-1)= 2^99 *(8-4-2-1)= 2^99