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maths

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i will be greatful to you if you help in solving the below problems:
1.)Prove that log15=log5+log3

2.)Show that log10800=4log2+3log3+2log5

3.)show that log108/605=2log2+3log3-log5-2log11.

  • maths -

    1.)Prove that log15=log5+log3
    hey 15 = 3 * 5
    log a b = log a + log b

    2.)Show that log10800=4log2+3log3+2log5
    log (2^4*3^3*5^2)
    log (16*27*25)
    log (10800)

    3.)show that log108/605=2log2+3log3-log5-2log11.

    log [ 2^2*3^3 /(5*11^2) ]

    log [ 4*27/(5*121) ]

    log [ 108 / 605 ]

    all of this is just
    log a*b = log a + log b
    and
    log a^n = n log a

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